| Anmelder |
Datum |
Patentnummer |
Cluster |
| The Carborundum Company (Niagara Falls, NY) |
1979-06-21 | 4292528.txt | cluster_31 |
| CARBORUNDUM CO (US) |
1980-05-02 | EP0020948A2.txt | cluster_31 |
| GTE Products Corporation (Stamford, CT) |
1982-01-06 | 4397803.txt | cluster_6 |